his December, everyone is likely seeking some holiday cheer and festive entertainment — perhaps something beyond white elephant gift exchanges, end-of-year work parties and family gatherings. The San Francisco Symphony and San Francisco’s Smuin Contemporary Ballet have answered that call for alternative, fun holiday events that both maintain tradition and welcomingly break away from it. The shows — “Holiday Gaiety” on Friday and Smuin Contemporary Ballet’s “The Christmas Ballet LGBTQ+ Night” on Tuesday — highlight the diversity and artistic prowess of the LGBTQ+ community via an array of performers and performances.